Re: Custom IC's

Paul Berger
 

Those are IBM House numbered TTL parts.

2392101  7402
2392102  7404
2392103  7405
2392112  7475
2392119  7496
2392135  7408



On 2020-05-24 11:39 a.m., Jannie van Zyl wrote:

Any idea what these 239 - 21xx chips might be? My Googling is failing me on this one. :) 

They reminded me of the the 1820- series in my HP2100. Seems like a similar naming convention?

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